Dewar temperatures

march,2002

The receiver systems have temperature sensors that measure the physical temperature of the 16 Kelvin, 70 Kelvin, and the OMT stages of the receiver. These temperatures are recorded daily. They are plotted below by year and for the last 5 and 30 days (updated each night). The color plots overplot all of the receivers on one plot using color to differentiate between the receviers. The black and white plots have a mosaic with 1 plot per receiver (if you don't have a color plotter, then you can make hardcopy with the black and white version). Some receivers do not have the temperature diodes to measure the 70K or the OMT stages. These plots will appear blank. See using idl to plot the dewar temperatures for routines that allow you to plot this data interactively.

plots of dewar temperature verus time
Date	16K stage color	70K stage color	OMT stage color	16K stage black & white	70K stage black & white	OMT stage black & white
last 5 days	16k_last5	70K_last5	omt_last5	16K_last5	70K_last5	omt_last5
last 30 days	16K_last30	70K_last30	omt_last30	16K_last30	70K_last30	omt_last30
Year to date	16K_2008	70K_2008	omt_2008	16K_2008	70K_2008	omt_2008
2007	16K_2007	70K_2007	omt_2007	16K_2007	70K_2007	omt_2007
2006	16K_2006	70K_2006	omt_2006	16K_2006	70K_2006	omt_2006
2005	16K_2005	70K_2005	omt_2005	16K_2005	70K_2005	omt_2005
2004	16K_2004	70K_2004	omt_2004	16K_2004	70K_2004	omt_2004
2003	16K_2003	70K_2003	omt_2003	16K_2003	70K_2003	omt_2003
2002	16K_2002	70K_2002	omt_2002	16K_2002	70K_2002	omt_2002
2001	16K_2001	70K_2001	omt_2001	16K_2001	70K_2001	omt_2001
2000	16K_2000	70K_2000	omt_2000	16K_2000	70K_2000	omt_2000
1999	16K_1999	70K_1999	omt_1999	16K_1999	70K_1999	omt_1999

Notes:

2004

08mar04 - cbh now included in plots.

2003

13jan03- lbn dewar warmed up for maintenance. xband 16K stage drops by 5K since now 2 rather than 3 dewars on the compressor.

15jan03- lbn op-amp for tempmonitor conversion I to V added bypass capacitors. Drifting should settle down..

16jan03- xb,sbn,lbn 1 compressor changed to (xb,sbh) (sbn,lbn)

26mar03 - xb,sbn,lbn back to 1 compresso sbh on 1 by itself.

04apr03 - lbn changed diode monitoring circuit to use old diode curve.

07apr03 - changed sbn diode board to use old diode curve..updated software

2002

18feb02 xb - xband moved to share compressor with sbn,lbn. 16K stage jumped a few degrees.

06apr02 lbw- left vacuum pump running on dewar. 70K 120->80K. must be a leak in dewar.

27jun02 lbw - warmed up lbw, regreased seals, added vacion pump (but not on yet), then cooled down.

10jul02 lbw - turned on vacion pump.

17sep02 lbn,xb - sbn no longer on compressor with xb,lbn (down for repairs). xb,lbn temps decreased.

24sep02 lbn,xb,sbn back to being on same compressor.

20dec02 switched to use continous sampling. last5 plots sampled every 22 secs, last_30 plots smoothed to 4 minutes.

processing: x101/dwtemp/dwtemp.pro

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